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Pharmacognostical Evaluation of Gymnema sylvestre R. Br.
Adarsh Kumar Agnihotri,Sayyada Khatoon,Manisha Agarwal,Ajay Kumar Singh Rawat,Shanta Mehrotra,Palpu Pushpangadan 한국생약학회 2004 Natural Product Sciences Vol.10 No.4
In India, Gymnema sylvestre due to the unique property of the plant to antagonize the sweet taste is known as ‘Gur-mar’. It has several ethnomedicinal values as various tribals/traditional communities and rural peoples of India find diverse medicinal uses viz. antidiabetic, stomachic, diuretic, and is useful in cough and throat troubles. Besides, it has strong effect on reducing blood sugar. The present communication deals with the detailed pharmacognostical evaluation of the aerial parts of G. sylvestre collected from three places of the country- Varanasi (U.P), Panchmarhi (M.P), Salem (Tami Nadu) and commercial sample procured from local market. The botanical and physico-chemical parameters of all the samples were quite similar though little variations were observed in foaming index, alcohol and water soluble extractives of local sample. The microscopic characteristics of the drug are horse shoe shaped petiole with 3 amphicribal vascular bundles, sieve tubes well developed; anomocytic stomata only on the abaxial surface of the leaf, the fan shapedamphicribal vascular bundle, presence of intraxylary phloem. The TLC fingerprint profile of all the samples was more or less similar only the quantity of some of the compounds varied.
Adarsh S.,Karthik S.,Shyma M.,Prem G. Das,Shirin Parveen A. T.,Sruthi Narayan 대한토목학회 2018 KSCE JOURNAL OF CIVIL ENGINEERING Vol.22 No.3
Severity-duration-frequency (S-D-F) curve is a useful hydrological tool for drought mitigation. This paper presents a bivariate copula approach for developing SDF relationships for Kerala meteorological subdivision, India based on the three month standardized precipitation index (SPI-3). First the univariate models were developed considering Gamma and Weibull distributions to represent the probability of severity and duration of SPI-3 series of the subdivision prepared from the area weighted precipitation data. The joint association of these drought variables is modeled by three Archimedean copulas namely Clayton, Frank and Gumbel- Hougaard (GH). The results showed that the difference between the joint SDF relations with the type of copulas is marginal upto return period 100 (~) whereas the conditional dependency of drought variables showed distinct differences. The conditional SDF relationships between severity and return period showed larger differences for longer duration and the behaviour is identical in the relationships between duration and return period for conditional severity values. Further, to outline the spatial variability of short term drought, a detailed examination on SDF relations of different districts in Kerala is made by considering representative fine resolution gridded rainfall (0.25o × 0.25o) datasets. SDF relationships of different locations in Kerala showed a shorter duration drought of less severity magnitude is prominent in districts like Wayanad, Kottayam and Pathanamthitta. The highest value of equilibrium severity for longer drought duration for all return periods is noticed for Palakkad while lowest value is observed for the district of Wayanad, which are the two low rainfall regions of the subdivision.
Design and Analysis of Lightweight Trust Mechanism for Accessing Data in MANETs
( Adarsh Kumar ),( Krishna Gopal ),( Alok Aggarwal ) 한국인터넷정보학회 2014 KSII Transactions on Internet and Information Syst Vol.8 No.3
Lightweight trust mechanism with lightweight cryptographic primitives has emerged as an important mechanism in resource constraint wireless sensor based mobile devices. In this work, outlier detection in lightweight Mobile Ad-hoc NETworks (MANETs) is extended to create the space of reliable trust cycle with anomaly detection mechanism and minimum energy losses [1]. Further, system is tested against outliers through detection ratios and anomaly scores before incorporating virtual programmable nodes to increase the efficiency. Security in proposed system is verified through ProVerif automated toolkit and mathematical analysis shows that it is strong against bad mouthing and on-off attacks. Performance of proposed technique is analyzed over different MANET routing protocols with variations in number of nodes and it is observed that system provide good amount of throughput with maximum of 20% increase in delay on increase of maximum of 100 nodes. System is reflecting good amount of scalability, optimization of resources and security. Lightweight modeling and policy analysis with lightweight cryptographic primitives shows that the intruders can be detection in few milliseconds without any conflicts in access rights.
Novel Trusted Hierarchy Construction for RFID Sensor–Based MANETs Using ECCs
Adarsh Kumar Agnihotri,Krishna Gopal,Alok Aggarwal 한국전자통신연구원 2015 ETRI Journal Vol.37 No.1
In resource-constrained, low-cost, radio-frequency identification (RFID) sensor–based mobile ad hoc networks (MANETs), ensuring security without performance degradation is a major challenge. This paper introduces a novel combination of steps in lightweight protocol integration to provide a secure network for RFID sensor–based MANETs using error-correcting codes (ECCs). The proposed scheme chooses a quasi-cyclic ECC. Key pairs are generated using the ECC for establishing a secure message communication. Probability analysis shows that code-based identification; key generation; and authentication and trust management schemes protect the network from Sybil, eclipse, and de-synchronization attacks. A lightweight model for the proposed sequence of steps is designed and analyzed using an Alloy analyzer. Results show that selection processes with ten nodes and five subgroup controllers identify attacks in only a few milliseconds. Margrave policy analysis shows that there is no conflict among the roles of network members.
Adarsh Bhat,Maithri Venkat,Xiaoyin Chen,Hiroko Ohtani,Kevin Ellwood,Tony Misovski,Johannes W. Schwank 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.103 No.-
This study elucidates the factors responsible for the deterioration of beaded activated carbon (BAC), usedin the abatement of volatile organic compounds that stem from painting processes in industries. In practice,continuous use of adsorbents during periodic adsorption–desorption results in the formation of heel(non-desorbable polymeric complex) in its pore structures, rendering the adsorbent eventually unusable. Here, the adsorption–desorption characteristics of VOCs from porous BAC are investigated, and an effectivesurface modification strategy is developed to impede heel formation and extend the operational lifeof the BAC. This modification protocol increases porosity by up-to 55 % and modifies the functionalgroups on the BAC surface without altering its structural integrity. Consequently, the adsorption capacityof the BAC increased by nearly 38% while decreasing the peak desorption temperature by as much as50 C due to lowered adsorption strength. Additionally, to provide mechanistic insights, the resultantchanges in porosity, surface morphology, and adsorption–desorption characteristics of the BAC are investigatedby N2 physisorption, SEM, TGA, and DRIFTS. Finally, cyclic adsorption–desorption studies conductedunder conditions mirroring the industrial setup proved that the percentage heel accumulationin surface modified BAC is significantly lower ( 3%) compared to unmodified BAC.
Adarsh Patel,Dr. Praveen Kaushik 한국통신학회 2018 ICT Express Vol.4 No.3
Quality of Service (QoS) performance of Vehicular Ad-hoc NETworks (VANETs) in Intelligent Transportation Systems (ITS) can be improved by varying the Clear Channel Assessment (CCA) mode-1 power. The CCA mode-1 threshold power is the minimum amount of energy required to declare the channel state busy by the physical layer. This paper identifies the applicability of adaptive CCA power in ITS devices by analyzing the impact of different CCA powers on the QoS of a VANET. QoS performance metrics such as packet delivery fraction, mean delay per packet, mean delay per hop and mean jitter are evaluated using the NS-3.26 simulator.
Adarsh Tripathi,Sujita Kumar Kar,Rashmi Shukla 대한정신약물학회 2018 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.16 No.1
Cognitive deficits are one of the core symptoms of schizophrenia that evolve during the course of schizophrenia, after being originated even before the onset of illness. Existing pharmacological and biological treatment modalities fall short to meet the needs to improve the cognitive symptoms; hence, various cognitive remediation strategies have been adopted to address these deficits. Research evidences suggest that cognitive remediation measures improve the functioning, limit disability bettering the quality of life. The functional outcomes of cognitive remediation in schizophrenia are resultant of neurobiological changes in specific brain areas. Recent years witnessed significant innovations in cognitive remediation strategies in schizophrenia. This comprehensive review highlights the biological correlates of cognitive deficits in schizophrenia and the remedial measures with evidence base.